Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
Refined silk fibroin obtained from waste cocoons was dissolved in a mixture of ethanol and neutral salt (calcium chloride) solution and the solution thus obtained was centrifuged and then acidified with an organic acid after dialysis. The pH of the resulting solution was in the acid side of the isoelectric point (pl=3…
For pt.I see ibid., vol.25, 1029-1036, 1990. The purpose of this work is to verify the validity of the new degradation model and the transformation equations which have been developed on the basis of thermokinetic considerations. This verification is implemented by comparing the temperature index (TI) values obtained…
We describe the theory, design, and performance of a new surface-plasmon-polariton-(SPP) assisted Raman scattering instrument that exploits the Kretschmann geometry. In contrast to previous methods, our device allows the entire SPP emission cone to be collected, thus optimizing the detected Raman intensity. This advan…
High resolution electron microscope images in amorphous Pd–Si alloy were calculated with various structure models and compared with the observed ones. For the structure models, atomic models of (1) dense random packing (DRP), (2) FCC atom clusters (embedded in DRP structure) and (3) icosahedral atom clusters (embedded…
Adsorption of polystyrenes (PS) and poly(methyl methacrylate)(PMMA) onto a non-porous silica (Aerosil 130) in trichloroethylene at 25 °C has been studied using IR and UV spectroscopies. Three important quantities, namely the amount adsorbed, A, the fraction, θ, of the silanol groups occupied by polymer chains, and the…
Abstract Polyurethane films were prepared using diphenylmethanediisocyanate [MDI] or hexamethylenediisocyanate [HDI] and poly(propylene‐ethylene) glycol, in order to test them as biomedical materials specifically for use as skin grafts. Other ingredients such as catalysts, chain extenders, solvents, etc., where not us…
This paper presents some results on the surface treatments given to natural fibers, namely coir, banana, and sisal fibers, using γ-methacryloxypropyltrimethoxysilane (MEMO), y-aminopropyltriethoxysilane (AMEO), sodium alginate (NaAl), and sodium hydroxide (NaOH) solutions. The cleaned, washed, and dried fibers were di…
Bonding of nitride ceramics (Si3N4 and AlN) to metals was carried out in a vacuum of about 6 mPa using Cu-base active filler metals. Reaction layers existed at the interfaces between Si3N4 or AlN and insert layers, and Cu enriched layers were found in the bonding layers. Reaction layers in Si3N4 to W joints were compo…
Isolation of actinomycetes is an indispensable step in the screening programs of industrially useful strains as well as in the ecological study of microorganisms. During the past 10 years, the author and his co-workers have studied the selective isolation methods of soil actinomycetes. A new medium and a variety of ne…
Spectres de reflectance diffuse de smectites dans le proche infrarouge en relation avec la composition chimique. — Les spectres-de réflectance haute résolution de 12 smectites sélectionnées ont été réalisés dans le domaine du proche infrarouge (1,0 à 2,5 μm). Les teneurs en Al, Mg, Fe et Si de ces minéraux ont été dét…
処理条件によって多様に変化するポリアニリソの分子構造を分光学的に追跡し,四つの基本的分子構造～ イミノフェニレン構造(IP),そのドープされた状態(IP+),酸処理によって生成するアソモニウム塩構造およびキノノイド構造(NP)を同定し,ポリアニリンの分子構造として通念化していたエメラルディン構造[(IP)m-(NP)m-]はポリアニリンの分子形態の一つに過ぎず,適正な処理で極限的な還元処理を行うことにより完全な連鎖構造の白色のポリ(イミノフェニレン)の調製が可能である事を示した。このような知見に基づきy実質的にIP構造から成るポリアニリンとステンレススチールの集電体とが一体化した形態の電極材を電気化学的に作製しfこれを正極としたリ…
Mechanical properties of ZrSiO4 sintered bodies, fabricated from a synthesized high purity ZrSiO4 powder, were studied at various Si/Zr atomic ratios of ZrSiO4 by the observation of microstructures, The ZrSiO4 powder was prepared by calcining a homogeneous mixture of ZrO2 and SiO2 sols containing ZrSiO4 seed particles…
Agglomerated crystals of enoxacin were prepared by a novel spherical crystallization technique using ammonia diffusion system (ADS). This technique made it possible to agglomerate amphoteric drugs like enoxacin which could not be agglomerated by the conventional means. When an ammonia water solution of enoxacin was po…
Tertiary recrystallized grain-oriented silicon steel sheets with thicknesses from 80 mu m to 20 mu m were developed. Such ultrathin sheets were produced with appropriate cold rolling and annealing. The magnetic induction B/sub 8/ of the sheet was above 1.95 T and the coercive force H/sub c/ was below 7 A/m. The AC iro…
ABSTRACT Processing cotton at the gin to minimize machinery usage and maximize monetary retums requires a thorough understanding of the performance characteristics of individual machines. A database involving multiple moisture, trash, machine and cotton levels was developed for all routine and laboratory fiber propert…
This paper describes several of the nuclear materials research and development programs that have involved ferrous metallurgy. The research programs high-lighted are as follows: For light water reactors, corrections have been made for corrosion of coolant piping and irradiation embrittlement of pressure vessel steels.…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCrystallographic studies on retinoidal-active and -inactive aromatic anilidesYoshiharu Toriumi, Atsushi Kasuya, and Akiko ItaiCite this: J. Org. Chem. 1990, 55, 1, 259–263Publication Date (Print):January 1, 1990Publication History Published online1 May 2002Published inissue…
The behaviour of blue phase III (BPIII) of chiral liquid crystals under the influence of an electric field has been studied for a mixture consisting of the chiral compound S811 and the nematic mixture EN18 exhibiting negative dielectric anisotropy εa < 0. As in one mixture with ε a < 0 studied previously, a dramatic i…
The A, B, C luminescence system from silicon is believed to originate with the radiative decay of an exciton bound to an isoelectronic trap. It was shown previously by Sauer, Weber, and Zulehner [Appl. Phys. Lett. 44, 440 (1984)] that nitrogen is one of the trap constituents. We present experimental evidence that conf…
In titanium alloys subsurface fatigue crack initiation occurs apparently without the existence of any defects such as inclusion or pore. We investigated subsurface crack initiation and sub-crack for Ti- 6Al-4V alloys at cryogenic temperatures, and discussed the growth mechanism of microcrack.As the maximum stress was…